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<html lang="en">
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    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>按钮</title>
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  <body>
    <a class="normal" href="#">PartS</a>
    <a class="special" href="#">ProjectS</a>
    <a class="normal" href="#">IS</a>
  </body>
</html>
